Thanks a lot for your reply.

"ataylor" wrote : With JBM 1.4 it is possible to specify the earliest time that 
a message will be delivered. The user manual explains how to do this, but here 
you are anyway.

If I understand this correctly I'd this way "schedule" by "calculating" when I 
do expect the just about to be send message being processed.

This would mean:

- Queue shall be allowed to deliver messages between, e.g., 9pm and 5am
- "Pre-Processing" starts at 9:30pm
- "Pre-Processing" now has to count and calculate, which messages can be send 
without any "earliest time" (or current time), because they're expected to be 
processed before 5am and send the rest with a timestamp of next, or even later, 
night.

If I understood this right this is not exactly what I'm looking for. I'm more 
interested in something that only "halts" the queues delivery attempts. If not 
automatically, but only by calling some MBean-operation I'd be fine.

Background is: pre-processing will be done in a much shorter amount of time 
than real message processing. Therefore one pre-processing run will generate a 
few million of messages which should be started to process. This will be 
finished within the time frame of one night. But than, at a defined time in the 
morning all message *deliveries* should be stopped and the messages kept "on 
hold".
Next evening, e.g. 9pm, I want to "unrelease" the queue and continue processing 
messages.

This should continue until the queue is empty.

I need the servers resources during work-time for business logic execution and 
want to process the lower priority "mega batch messages" during "night-shift" 
asynchronously.

Any help appreciated, thanks a lot :-)
-- 
Regards,

P.

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